docs: def setFDs(self):
          """
          Iterator for file descriptors.
          Seperated from launchworkers for clarity and readability.
          """
          # 0 corresponds to stdin, 1 to stdout, 2 to stderr
          self.childFDs = {0: 0, 1: 1, 2: 2}
          self.fds = {}
          for name in self.servers:
              self.port = self.hendrix.get_port(name)
              fd = self.port.fileno()
              self.childFDs[fd] = fd
              self.fds[name] = fd